Typewriting machine



Aug. 4, 1925. 1,548,320

A. A. JOHN SON TYPEWRITING MACHINE Fi1ed'Nov`. 16. 1922 F/gz MLN,

///fir Patented Aug. 4, 1925.

UNITED STATES PATENT OFFICE.

ARTHUR A. JOHNSON, OF NEW YORK, N. Y., ASSIGNOB T0 UNDERWOOD TYPEWRITEB,

COMPANY, OF NEW YORK, N.. Y.,

A CORPORATION OF DELAWARE TYPEWRITING MACHINE.

' Application led November 1,6, 1922. Serial No. 601,218.

To all whom it may concern.: n

Be it known that I, ARTHUR A. JOHNSON,

4a citizen of the United States, residing in ing machines ofthecontinu'ous billing type -such as that disclosed in the patent toWerner-y & Smith, No. 1,132,055. In a machine of this type, there isprovided s rear carriage-extension which travels from side to side ofthe machine, with the carriage, on a rearward extension of the frame.Upon this carriage-extension is mounted a carbon carriage movable towardand from the platen, to hold carbon-sheets interleaved with the folds ofa continuous manifold web fed to the machine from the rear. Thecarbon-carriage is provided with steppedsupports having holes thereinlfor receiving studs on carbon-sheet-holding blades which extendalternately across the path of the webs from opposite sides thereof.Each blade is provided with a clip for clipping a carbon-sheet thereto.

It/ sometimes happens that the carbonsheet is clipped to thecarbon-blade inan incorrect angular position, that is, in a position inwhich the carbon-sheet will not be parallel to the direction in whichthe webs are fed to the machine. sheets are used, aslight error in theangular position in which a carbon-sheet is clipped to the carbon-bladewill cause the portion of thefsheet remote from the blade to bemisplaced laterally to quite a substantial extent. It is difiicult todetermine exactly the proper position of attachment of the carbon-sheetto the blade, and, where the usual type of blade is used, this can onlybe done by re peated trials. f

With the purpose in view of obviating this diliiculty, a feature of thepresent invention consists in the provision of a. carbon-carrying bladewhich is angularly adjustable on the carbon-carriage, whereby acarbon-sheet, clipped to the blade, may be brought into parallelism withthe continuous work-webs by angular adjustment of the blade.

Another feature of the invention consists in the provision of acarbon-blade and means When long carbon-V Afor angular-ly adjusting thecarbon-blade, so

arranged that the angularposition of the blade cannot be changed by apull exerted upon the carbonsheet.

Another feature consists in the provision of means for effecting acombined bodily and angular adjustment of the carbon-sheets.

Other features and advantages will herel,

inafter appear.

In the accompanying drawings,

Figure 1 is a plan view of parts of a typewriter of the continuousbilling type having the present improvements applied thereto.

Figure 2 is a fragmentary plan View of the carbon-holder-adjustingmeans, on a larger scale than Figure 1.

Figure 3 is a longitudinal vertical section of the structure shown inFigure 2.

Figure 4 is a plan'view, similar to Figure 2, showing the parts in adifferent adjusted position.

The typewriting machine, in common with other machines of thi's type,comprises a carriage (not shown) having a rearward extension 11 movablewith the carriage in letter-feed direction by the usualcarriagepropelling spring, not shown, and in the reverse direction bymanual operation. This carriage-extension is supported and guided by theusual rearward extension of the machine-frame. A carbon-carriage 13 ispro-` vided for holding carbon-sheets 14 interleaved between the pliesof work-webs 15, which may be"either fan-,fold webs or separate plies,and which are fed to the machine from the rear. This carbon-carriage isstepped to hold the carbon-shcets at suitable elevations, and, duringwriting operations, is drawn by the webs 15 toward the platenl 16 ateach line-spacing operation of the latter, being guided in such movementon rails 17, forming a part of the carriage-extension. Thecarbon-carriage 13 may be returned to the rear limit of its movementwhen a form has been completed, as explained in the patent to Wernery &Smith, above referred to, to bring the carbon-sheets 14 intoco-operation with a fresh portion of the work-Webs.

0n each step 18 of the carbon-carriage 13 there is provided a shortplate 19 having a slot 20 therein, which plate is lixedly, butdetachably, secured to the carbon-carriage 13 by studs 21 which arereceived in holes 22 in the carbon-carriage- A circular cam 23 iseccentrically pivoted on the plate 19 to relatively stationarycarbon-blades,

entend above the upper surface thereof and is slidingly received in aclosely-fitting circular opening Zlio the end ofa carbon-car# ryingblade 25. A headed 'pivot-stud 26 connects a carboivclip 27 to thecarbon-blade 25, and hasits head received in the slot 20 in the plate19. A spacing washer 28, of substantially the same thickness as thecarbon-clip, is positioned around the circular cam 23 between the. plate19 and the carbonblade 25. A threaded stenl 29 extends upwardly from thecenter ot the eccentricallymounted circular cam 23, and is surrounded bv a washer 30 which bears against the upper face of the carbon-blade 25.A knurled nut 3l for turning the eccentric is screwed upon this stein Q9to hold the plate 19, carbon-blade Q5 and washers 28 and 30 in assembledposition, and a second nut 32 is screwed upon the stem to lock the firstnut.

lVhen a carbon-sheet 14, clipped by a blade LCi and clip 2T in themachine, is found to occupy a crooked position, the operator will turnthe nut 31' on the stem 29 and thereby rotate the eccentric cam 23 aboutits pivot. Rotation ot the cam 23 will change the angular position ofthe carbonbladcQ through `the action of the cam on the walls of thecircular opening 24 in the blade, and of the slot 2O on the head of thestud 26, thus adjust-ing the angle of the carbon-sheet carried by theblade.

The ratio ofthe radius ofthe eccentric cam to the radius of the circularpath traversed by its center, and the co-etiicient of friction betweenthe carbon-blade and the eri )heral surface of the eccentric are so reate that it is not possible to turnthe eccentric by force exerted uponthe carb0n-blade- There is, therefore, no possibility of the angularadjustment of the blade being affected by the pull of the work-webs uponthe carbonsheet.

The angular ad`ustment of the carbonholders is attended y some bodilymovement, and, while thisis not great, it is possible that thecarbon-sheet may, under some circumstances, be found to be misplacedbodily when the angular adjustment has been effected. Due to the natureof the adjust-ing means, however, there will be two ositions which a.carbon-holder may occupy or every angular position assumed by it. shouldthe carbon-sheet be found to be mis laced bodil after its angularadjustment as been .e fected, the operator may adjust it bodily byrotating the eccentric cam to move the blade to the other position inwhich it will bear the same angular relationship to the carboncarriage.

The studs 21 on the plates 19 are arranged to co-o erate with the holesordinarily provided 1n the carboncarriages of machines of this type forthe direct attachment1` pf e device disclosed herein is, therefore,capable of being inserted in existing machines with" -sheet=holderangularly for bringing the carbonsheet attached thereto completely intothe field of the work and thereby com nsating for skewed attachment ofthe car onshect, and for retaining it in adjusted position.

2. In a tyiewriting machine, a carlxinsheet-holder or holdingcarbon-sheets inter leaved with work-sheets, comprisingcarbonsheet-clipping mea-ns, and means for angularly adjusting acarbon-sheet in the machine while it is clipped by said clipping mea-ns,and compensating for skewed attachment of the carbon-sheet to theclipping means.

3. In a typewriting machine, a carbonpaper-holder, and means forangularly adjusting the carlxm-paper-holder and retaining it in adjustedposition, comprising an eccentric, manually-operated means for adjustingthe eccentric, and means co-operating with the eccentric to control theangular adjustment of the carbonpaper-holdcr.

4. In a typewriting machine, a carbonpaper-holder, a carbon-sheet-clipthereon a vfinger-piece rotatable by they operator, and

connections between the finger-piece and the carbon-sheet-clip forcausing the latter to be angularly adjusted by rotation of the former,said connections being arranged to be inherently immovable by thecarbon-sheet-clip, and so causing the clip to be positively retained inany position to winch it is adjusted.

5. In a typewriting machine having a platen, a carbon-paper carriagemovable toward and from the platen, carbon-sheetclips mounted on thecarbon-pa r carriage, and means for individually justng carbon-sheetswhile held by said clips to cause their lateral edges to liesubstantially in parallelism to the direction of movement of thecarbon-paper carriage, the arrangement being such that skewed attachmentof the carbon-sheets to the clips can be compensated for, thus obviatingrepeated trials in the attachment of the carbon-sheets.'

6. In a typewriting machine, a carboncarriage, a slotted plate detachablsecured thereto, a circular cam eccentrical mounted on the plate, acarbon-sheet-ho der having an opening which encircles the cam, and astud s idable in the slot of the plate, and

means for rotating the cam to change the angular position of thecarbon-sheet-holder and thereby alter the position of a carbonsheet heldby it.

7. In a typewriting machine, a carboncarriage, a slotted platedetachably secured thereto, a circular cam eccentrically mount- 'ed forrotation on said plate, a carbon-sheetholder comprising a blade havingan opening for cooperation with the circular cam, a pivot-stud on theblade, and a cli pivoted on the stud, the said 'stud extending into theslot in the blade, and means for turning the circular cam to adjust theangular position of the carbon-sheet-holder.

8. In a typewriting machine, a carboni paper carnage, a supportdetachably seof the carbon-sheet thereon, or in parallelism, and meansfor effecting such adjustments.

10. In a typewriting machine, a support, a carbon-sheet-holder mountedon the 'support, and means for adjusting the position and correcting'the skewing of a carbonsheet, includin means for adjusting thecarbon-sheet-ho der to move the opposite ends of a carbon-sheet heldthereby either in the same or opposite directions laterally of themachine at the will of the operator.

11. For use in a continuous billing typewriting machine having acarbon-carriage, a carbon-holding device, comprising a basemember, meansfor attaching the base-member to the carbon-carriage, a carbon-holdermounted for swinging movement on said base-member, means for swingingthe carbon-holder relatively to the base-member, and means forpositively preventing accidental swinging movement of the carbonholderin either direction.

12. In combination, a carbon-holder, a fulcrum-member thereon, a supportfor said carbon-holder having a slot therein for receiving saidulcrum-member, and adjustable means on the support for moving thecarbon-holder about the ulcrum in the slot to change the angularposition of the carbon-holder.

13. In a typewriting machine, a carbonsheet-holder, a support therefor,a pin-andslot connection between the holder and support, and aneccentric pivoted on the 'support and encircled by the carbon-holder forco-operation therewith, said eccentric being pivoted sufficiently nearits center to preclude the possibihty of its being turned by pressure ofthe carbon-holder upon its periphery.

ARTHUR A. JOHNSON.

Witnesses:

JESSE A. B. SMITH, JENNIE P. THORNE.

